Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f09b0c9e50a3a09…

MALICIOUS

PDF

48.6 KB Created: 2020-11-06 15:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3827e8167641163e5ed901133b184800 SHA-1: b6daca1e9f14f72f92b6d6b94812cf8bede9e042 SHA-256: 9f09b0c9e50a3a0904e25e05dcc47813512df182c9d60815eae5a0211d84222a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The embedded URL `https://traffset.ru/aws?keyword=singer+sewing+machine+repair+manuals+free` indicates a lure related to free sewing machine repair manuals. While no scripts were directly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to drive traffic or potentially host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffset.ru/aws?keyword=singer+sewing+machine+repair+manuals+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f9e47ec5e047.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/bavasisati-jusewem.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1243633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fa0d4e65b313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5f9c225415bd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f8f75ec652e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5f8f1c082dd72.pdfIn PDF document text
    • https://kafedujewerom.weebly.com/uploads/1/3/4/6/134622586/8802884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_5fa025ee36d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424364/normal_5f9f57289630f.pdfIn PDF document text
    • https://deroguba.weebly.com/uploads/1/3/4/6/134684347/3154397.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/bijix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/841393007.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/devozimulasigalusebose.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/jewiwerigiji.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 5624 bytes
SHA-256: 8a3334561a7482b7752889605d9388c87d128732f61d83fcd78e6559597cbbec
font_01_sfnt_off00009053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9053 10660 bytes
SHA-256: c506196a4bc0ec821ab1562508fc87f61a183a4544a1da92f61d50cf9cbf0335

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